风电结构用耐低温SM490YB特厚钢板的焊接性能研究  

Research on welding performance of extra-heavy steel plate SM490YB with low-temperature capability for wind power structure

作　　者：徐光琴 张丽娜 郎永胜 Xu Guangqin;Zhang Lina;Lang Yongsheng(Jiangying Xingcheng Specail Steel Works CO.,Ltd.,Jiangyin 214400,Jiangsu,China)

机构地区：[1]江阴兴澄特种钢铁有限公司,江阴214400

出　　处：《特钢技术》2022年第4期41-44,共4页Special Steel Technology

摘　　要：以115mm厚风电结构用耐低温SM490YB钢板为研究对象,选用Φ1.2mm的DW-A55L、双面U型坡口、80%Ar+20%CO_(2)混合气体保护、预热温度150℃、道间温度≤200℃的工艺进行焊接试验,对其焊接接头显微组织和力学性能进行试验研究。试验结果表明:在焊接热输入量为15kJ/cm的条件下,焊接接头可获得良好的综合性能,板厚1/2位置焊接接头抗拉强度>490MPa,板厚1/2处焊缝中心、FL、FL+2、FL+5和最大通过热影响区的-50℃冲击功平均值均>100J。This paper focuses on the welding performance of low-temperature resistant steel plate SM490YB with a thickness of 115mm for wind power structure. The welding test selected a process of Φ1.2mm DW-A55L welding wire, double-sided U-shaped groove, mixed gas protection of 80% Ar+20% CO2, preheating temperature of 150℃ and interlayer temperature ≤200℃ for testing the microstructure and mechanical properties of the welded joint. The test results show that under the condition of welding heat input of 15kJ/cm, the welded joint achieves good comprehensive performance with the tensile strength higher than 490MPa at the position of half the plate thickness, and the average impact energy of-50℃ higher than 100J in the weld center, FL, FL+2, FL+5 and the heat-affected zone of half the plate thickness,.

关 键 词：风电结构 低温 SM490YB 特厚钢板 焊接性能 

分 类 号：TG457.11[金属学及工艺—焊接]